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Everyone has one nostril that is larger than the other.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.